EP 3009472 A1 20160420 - PRE-FORMED APEX/BEAD COMPOSITE AND TIRE WITH PRE-APEXED BEAD
Title (en)
PRE-FORMED APEX/BEAD COMPOSITE AND TIRE WITH PRE-APEXED BEAD
Title (de)
VORGEFORMTES KERNREITER/WULSTVERBUNDMATERIAL UND REIFEN MIT VORGEFORMTEM KERNREITER-WULST
Title (fr)
COMPOSITE D'APEX/TALON PRÉFORMÉ ET PNEU AVEC TALON PRE-APEX
Publication
Application
Priority
US 201414513541 A 20141014
Abstract (en)
A method of preparing an apex/bead assembly is disclosed. The method comprises mixing a sulfur curable uncured rubber composition with a maximum mixing temperature in a range of from 140 to 170°C; and extruding the sulfur curable uncured rubber composition through a die to form and apply an uncured apex rubber strip (8) onto and circumferentially around the outer periphery of an annular bead (3) comprising an uncured rubber encapsulated plurality of wire cords; wherein the rubber composition of the uncured apex rubber strip (8) comprises: (A) at least one diene-based elastomer comprising at least one of cis 1,4-polyisoprene, polybutadiene and styrene/butadiene rubber; (B) from 1 to 10 or from 3 to 7 parts by weight thermoplastic syndiotactic-1,2-polybutadiene per 100 part by weight of the elastomer(s) contained in the apex rubber strip composition, wherein the syndiotactic-1,2-polybutadiene has a melting point (MP) in a range of from 180°C to 230°C and at least 10°C higher than the maximum mixing temperature for the preparation of the sulfur curable uncured rubber composition and is provided in the form of an alloy comprising said thermoplastic syndiotactic-1,2-polybutadiene with at least one of cis 1,4-polyisoprene rubber and polybutadiene rubber; (C) from 30 to 120 phr of a reinforcing filler comprising: (1) a carbon black, or (2) a combination of a carbon black and silica together with a coupling agent for the silica having a moiety reactive with hydroxyl groups on the silica and another different moiety interactive with said diene-based elastomer(s). Also, a respective pre-apexed annular tire bead is disclosed and a pneumatic tire comprising such a pre-apexed annular tire bead.
IPC 8 full level
B60C 1/00 (2006.01); C08L 7/00 (2006.01); C08L 9/00 (2006.01); C08L 9/06 (2006.01); C08K 3/04 (2006.01)
CPC (source: BR EP US)
B29D 30/0681 (2013.01 - BR); B29D 30/08 (2013.01 - BR); B29D 30/48 (2013.01 - EP US); B60C 15/0603 (2013.01 - EP US); C08K 3/04 (2013.01 - EP US); C08L 7/00 (2013.01 - EP US); C08L 9/00 (2013.01 - EP US); C08L 9/06 (2013.01 - EP US); B29D 2030/482 (2013.01 - EP US); B29K 2009/00 (2013.01 - US); B29K 2507/04 (2013.01 - US); B60C 2001/0058 (2013.01 - EP US); C08L 7/00 (2013.01 - BR); C08L 9/06 (2013.01 - BR)
Citation (applicant)
- US 5307850 A 19940503 - HALASA ADEL F [US], et al
- US 6156143 A 20001205 - MALY NEIL ARTHUR [US], et al
- US 6202726 B1 20010320 - CORVASCE FILOMENO GENNARO [LU], et al
- US 6539996 B1 20030401 - CORVASCE FILOMENO GENNARO [LU], et al
- US 6956093 B1 20051018 - HSU WEN-LIANG [US], et al
- US 8536262 B2 20130917 - SCHWEITZER CLAUDE [LU], et al
- US 5283294 A 19940201 - HSU WEN-LIANG [US], et al
- US 3901868 A 19750826 - UENO HARUO, et al
- US 4506031 A 19850319 - HENDERSON JAMES N [US], et al
- "The Vanderbilt Rubber Handbook", 1990, pages: 416 - 418
Citation (search report)
- [XY] US 2012259051 A1 20121011 - MIYAZAKI TATSUYA [JP]
- [XY] US 2012296027 A1 20121122 - MIYAZAKI TATSUYA [JP]
- [XY] EP 1241219 A1 20020918 - GOODYEAR TIRE & RUBBER [US]
- [XY] US 2010256258 A1 20101007 - MIYAZAKI TATSUYA [JP]
- [XY] US 2012267026 A1 20121025 - MIYAZAKI TATSUYA [JP]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3009472 A1 20160420; EP 3009472 B1 20181128; BR 102015026118 A2 20160920; CN 105501001 A 20160420; US 2016101581 A1 20160414
DOCDB simple family (application)
EP 15187109 A 20150928; BR 102015026118 A 20151014; CN 201510660772 A 20151014; US 201414513541 A 20141014